Comparison between the flux expected in the 30 MeV−3 GeV energy range (from the extrapolation of the keV−MeV spectral component) and the flux upper limit estimated in the same energy range. The sample is composed of the 28 GRBs for which it has been possible to estimate the peak energy of the prompt component from the spectral analysis. Preliminary spectral results from the GCN are considered: in 10 cases the spectrum is well fit by a BAND model (filled circles), while in 18 cases the best-fit model is a power law with an exponential cutoff (filled stars). Open gray symbols show the same comparison when spectral parameters are taken from Nava et al. (2011) and Bissaldi et al. (2011).